Merge OrbitOS into project — one install, everything ready

- Added 15 OrbitOS skills (bundled in skills/orbitos/)
- Added vault structure templates (views, templates, prompts)
- Added install.sh (macOS + Linux)
- Removed references/orbitos-skills.md (no longer needed)
- Updated README: 30 skills total, unified install flow

Total: 9 mm* + 6 dependencies + 15 orbitos = 30 skills

vault-structure/99_System/Templates/Inbox_Template.md

@@ -0,0 +1,12 @@
+---
+type: inbox
+created: <% tp.date.now("YYYY-MM-DD") %>
+topic:
+due:
+priority:
+status: captured
+source:
+related:
+tags:
+  - inbox
+---